JPH06282318A - Mumerically controlled machine tool - Google Patents

Abstract

PURPOSE:To quickly execute the processing of an M command by instantaneously shifting the processing of the M command to the execution of the succeeding command when the waiting of the completion of the M command is unnecessary. CONSTITUTION:When an M command is generated, whether the M command is in execution or not is judged (step 1201). When the M command is being executed, the output of the M command is allowed to incompletely end (step 1209). When the M command is not being executed, the specified M command is stored (step 1202) and outputted (step 1203) and then whether the waiting of the completion of the M command is unnecessary or not is checked (step 1205). When the waiting of M command completion is necessary, the execution of the succeeding instruction is not allowed (step 1206). In this case, the succeeding instruction is executed after the completion of the M command. When the waiting of the M command completion is unnecessary, the execution of the succeeding instruction is allowed (step 1207). In this case, the succeeding instruction is executed without waiting the completion of the M command. Consequently the M command processing can quickly be executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled machine tool that facilitates auxiliary command processing and facilitates checking of machining programs.

[0002]

2. Description of the Related Art In recent years, a numerical control device with a built-in computer (hereinafter,
Machine tools using CNC (hereinafter referred to as numerically controlled machine tools) have become widespread, and automation and labor saving in the machining field have been promoted. The numerically controlled machine tool is composed of a CNC, a high voltage sequence circuit and a machine tool. The heavy-duty sequence circuit is located between the CNC and the machine tool and performs various auxiliary tasks. Conventionally, the heavy-duty sequence circuit is normally made up of 200 to 300 relay circuits, depending on the scale of the machine. Just as a numerical control device (hereinafter referred to as NC) has moved from the wiring logic NC to the CNC, a programmable controller using a microprocessor (hereinafter referred to as PC) has become the mainstream from the relay circuit to the high voltage sequence circuit.

The PC includes a general-purpose PC and a built-in P dedicated to the CNC.
There is C. A general-purpose PC is used in machine tools that have hundreds of tools and autoloaders and require complicated sequences and input / output signals, but most machine tools have built-in PCs.
Is enough. In a built-in PC for a lathe or a small machining center, an independent microprocessor for the PC is not prepared, and the PC function can be exerted by utilizing the spare capacity of the CNC microprocessor. In this case, the number of parts for the PC is extremely small, and it is possible to realize the one excellent in reliability and cost.

Since a PC with a built-in CNC is built in the CNC, there is also an advantage that a space for installing the PC on the machine side is not required. Data transfer between the built-in PC and the CNC does not require a special driver / receiver and can be done with a common bus (or equivalent).
The number of input / output points required for is about half that in the case of using a general-purpose PC.

Various settings such as timers and counters for the PC, status display and alarm message display can be performed using the CNC operation panel, and no other operation panel is required. FIG. 15 is a schematic configuration diagram of a CNC machine tool using a CNC with a built-in PC,
In the figure, 10 is a CNC section, and 20 is a machine tool section. The CNC unit 10 is composed of an NC unit 1, a PC unit 2, and an input / output circuit 3. The NC unit 1 includes an operator and a CNC.
It is composed of a man-machine control unit 4 which controls by a man-machine interface with a machine tool, an auxiliary command control unit 5 which controls auxiliary commands such as M command, S command and T command, and an axis movement control unit 6 which controls servo axes. To be done.

The PC section 2 is a section for storing a sequence program, and is a sequence control device having a structure similar to that of a computer (not shown), and includes a CPU and a program storage device mainly composed of a semiconductor memory such as ROM and RAM. It is configured. The input / output circuit 3 is an interface portion with the machine side, and is composed of a driver and a receiver, and is provided with the machine operation panel 12 of the machine tool section 20 and the high voltage circuit 1.
3, connected to the spindle amplifier 15 and the like.

The machine tool section 20 includes an operator and a CNC.
N, which is the center of the man-machine interface of machine tools
There is a C operation panel 11, which is usually composed of a CRT device, a numeric keypad, etc., and is used to display the data of the NC unit 1 on the CRT device or to input the data from the numeric keypad.

In addition, the machine operation panel 12 is mainly for the operator to manually operate the machine tool, and the high-power circuit 13 is for controlling the actuators of the machine parts 14.
The spindle amplifier 15 controls the spindle motor 16, and the speed control unit 17 controls the 18 feed motors.

The original work of the machine tool is machining such as cutting and grinding, but there are many auxiliary jobs for performing this machining. For example, attachment / detachment of a workpiece, start / stop of a spindle motor, turning on / off of cutting oil, selection of a tool, and the like. These auxiliary jobs are processed by the PC unit 2 in response to the auxiliary function signal (M command), tool selection signal (T command), etc. sent from the NC unit 1.

FIG. 16 is an explanatory diagram of a conventional auxiliary function signal interface. The NC unit 1 sends a 2-digit BCD M code signal (M11 to M28) and a code reading signal (hereinafter referred to as MF) to the PC unit 2, and the sent code signal is decoded by the PC unit 2 and required. The actuator is driven in a predetermined sequence and the commanded operation is performed.

When the operation is completed, a completion signal (hereinafter referred to as FIN
Will be sent to the NC unit 1. This causes the NC unit 1 to turn off the MF. Then, the FIN is turned off and the M code signal is turned off, and the next block is commanded. A time chart of this operation is shown in FIG.

FIG. 18 is a diagram showing a flow from creation of a machining program to inspection of a workpiece. The programmer 101 creates an NC machining program while looking at the machining drawing 100 (step 102). The processing program is created by a normal EIA format, an automatic program mounted on a CNC which has been widely used in recent years, or an off-line CAM. Reference numeral 103 is an NC machining program created in this way.

When the creation of the machining program 103 is completed, the machining program 103 is checked (step 104). This can be done by displaying the path of the machining path on the screen, etc., because many recent CNCs can display graphics. If the machining program 103 is considered to be correct, the machine tool is actually moved by blank cutting and the machining program 103 is checked while confirming the operation of the machine tool (step 105). If it seems that the cutting can be performed correctly, the work is actually attached and trial machining is performed (step 106). If it can be cut correctly, full-scale cutting is started (step 107),
The workpiece is inspected if necessary (step 108). When a defect of the machining program is found in each step of steps 104 to 108, the machining program 103 is corrected (step 109), and rechecking is performed from the necessary step of steps 104 to 108.

[0014]

Since the conventional numerically controlled machine tool is constructed as described above, even for an auxiliary command that does not need to wait for completion, the next numerical command is waited for after completion of each auxiliary command. There was a first problem that the processing time wasted because it proceeded to the step.

To solve this problem, JP-A-62-1
As disclosed in Japanese Patent Publication No. 89506, for the M command that does not need to wait for the completion of the M command, a method of processing the next block without waiting for the FIN is shown, but simply waiting for the FIN of the M command. If the next block is processed without doing so, a problem occurs in the following case, and the M command cannot be correctly executed.

That is, if the next block is executed without waiting for the FIN of the first M command and the second M command is present in the next block, if the second M command is output as it is to the PC, Since the PC is executing the first M command, the second
The M command is ignored, or a problem occurs in the PC such that the first M command is interrupted and the second M command is executed. In the above-mentioned prior art, it is not particularly described that the interface with the PC is changed, and if the interface with the PC remains the same as before, the next M command is processed while the PC is processing the M command. It is not allowed to output.

In addition, when the machining program is checked while operating the machine tool, it is possible to select only two options, that is, all the auxiliary commands are executed at the time of idle cutting or the auxiliary commands are not executed by the auxiliary command lock function. Because
There was the second problem of insufficient checks.

Further, when the machining program is checked while actually moving the machine, there is a third problem that there is no function suitable for checking the machine by moving the machine little by little in a portion where the machine is likely to interfere.

The first invention is made to solve the above-mentioned first problem, and executes the following steps without waiting for the completion of the auxiliary command for the auxiliary command which does not need to wait for the completion of the auxiliary command. The purpose is to obtain a numerically controlled machine tool.

The second invention is made to solve the second problem, and the machining program can be easily checked by not executing only a specific auxiliary command even if specified. The purpose is to obtain a numerically controlled machine tool.

A third aspect of the present invention has been made to solve the second problem, and a numerical value that allows a machining program to be easily checked by executing only a specific auxiliary command even while the auxiliary command is locked. The purpose is to obtain a controlled machine tool.

A fourth aspect of the present invention has been made to solve the above-mentioned third problem. The fourth aspect of the present invention is to move the tool path designated by the machining program by the designated distance each time the movement distance is designated. The object is to obtain a numerically controlled machine tool that can be stopped.

[0023]

A first aspect of the present invention is a numerically controlled machine tool for performing auxiliary work for machining through a programmable controller section based on a machining program composed of a plurality of command blocks. In the above, in the auxiliary command for instructing the auxiliary work, there is no problem even if the next command block is executed without waiting for the completion of the auxiliary command. And an execution assistance command registration unit that writes the assistance command to be executed when the assistance command is executed, and erases the assistance command when the assistance command is completed, and an execution assistance that stores the result registered by the execution assistance command registration unit. The command storage means and the execution auxiliary command storage means when the second command block contains an auxiliary command for the first command block being executed. By recognizing it, it is determined whether or not the auxiliary command is being executed in the first command block, and if the auxiliary command is being executed, execution of the auxiliary command in the second command block is waited. Auxiliary command executability determining means, and when executing the auxiliary command of the second command block,
Auxiliary command is not required to wait for completion Auxiliary command The third command block is executed without waiting for completion of the auxiliary command, and if the auxiliary command is an auxiliary command requiring completion, wait for completion of the auxiliary command. And a next command block executability determining means for executing the third command block.

A second aspect of the present invention is, in a numerically controlled machine tool having a test mode for testing a machining program, a test mode lock designating means for designating an auxiliary command which is not executed in the test mode, and the test mode lock designating means. And a test lock storage means for storing the auxiliary command designated by the above, and a test lock determination means for checking the test lock storage means in the test mode and determining whether or not the auxiliary command designated by the machining program can be executed. It is equipped with.

According to a third aspect of the present invention, in a numerically controlled machine tool having a machining program test mode and lock means for locking the auxiliary instruction so that it is not executed, the auxiliary instruction is locked by the lock means. In the test mode, a forced output designating unit that designates an auxiliary command that enables execution even if there is any, a forced output storage unit that stores the auxiliary command designated by the forced output designating unit in the test mode, and in the test mode, Even when the auxiliary command is locked by the locking means,
Forced output determination means for checking the forced output storage means and determining whether or not the auxiliary command designated by the machining program can be executed.

According to a fourth aspect of the present invention, in a numerically controlled machine tool having a machining program test mode, a test movement amount designating means for designating a tool movement amount in the test mode and a machining program designated in the test mode. And a designated movement distance extraction unit that executes the tool by moving the tool on the tool locus by the movement amount designated by the test movement amount designating unit.

[0027]

According to the numerically controlled machine tool of the first invention,
Without changing the interface between the NC unit and the PC unit in the related art, it is possible to eliminate dead time caused by unnecessary completion waiting for auxiliary commands that do not require completion waiting.

According to the numerically controlled machine tool of the second aspect of the present invention, by executing only the specific auxiliary command in the test mode, the machine tool is actually moved to test the NC machining program. The test becomes easy because the auxiliary command that hinders the execution of the command is not executed.

According to the numerically controlled machine tool of the third aspect of the present invention, when only the specific auxiliary command is executed even in the auxiliary command locked state in the test mode, when actually operating the machine tool to test the NC machining program. , It becomes possible to perform only the necessary machining operation, and the test becomes easy.

According to the numerically controlled machine tool of the fourth aspect of the invention, the moving distance of the tool is specified in the test mode, and the machine stops after moving by the specified distance.
When testing the C machining program, the tool can be moved by the amount of movement as desired by the operator, facilitating the test.

[0031]

【Example】

Example 1. A numerically controlled machine tool according to the first invention will be described. FIG. 1 shows a built-in PC according to an embodiment of the present invention.
It is a general | schematic block diagram of the CNC machine tool which used CNC with. In the figure, 1A is an NC part, 1OA is a CNC part,
Reference numeral 51 denotes a completion waiting unnecessary auxiliary instruction designating section for designating an auxiliary instruction not requiring completion waiting, 52 is an execution auxiliary instruction registering section for registering an auxiliary instruction to be executed, and 53 stores an execution auxiliary instruction registered by the execution auxiliary instruction registering section 52. Executing auxiliary command storage unit, 54
Is executing the auxiliary instruction storage unit 5 when the auxiliary instruction is issued.
3, the auxiliary command executability determination unit that determines whether the commanded auxiliary command can be executed, 55 determines whether the next block can be executed without waiting for the completion of the auxiliary command that is being executed This is a next block executability determining unit.
Further, the same reference numerals as those in FIG. 15 have the same contents, and the description thereof will be omitted.

FIG. 2 is an example of a screen display for designating an M command according to an embodiment of the present invention. It can be set on the screen on the NC operation panel 11. In the figure, 161 is the M command value, 1
Reference numeral 63 is a table for designating an M command which does not require completion waiting (hereinafter referred to as "completion waiting unnecessary" section). Regarding the M command to which “*” is added in the “no need for waiting for completion” section 163, the next command can be executed without waiting for the completion of the M command even if the M command is being executed. To specify “*”, the cursor is moved to the “necessary for waiting for completion” portion 163 of the corresponding M command, and if there is no need for waiting for completion, the numerical value “1” is keyed in.
When "1" is keyed in, an "*" mark is displayed on the screen, indicating that the corresponding M command has been designated as an M command that does not require completion waiting. If it is an M command that requires waiting for completion, "0" may be keyed in. When "0" is keyed in, the corresponding part becomes blank on the screen.

FIG. 3 is a table showing the state of the M command according to the embodiment of the present invention. In this table 150, P
M command value (hereinafter referred to as MD) 151 being executed by the C unit 151
Is stored. The MD 151 stores the M command being executed when the PC unit 2 is executing the M command, and stores a value of "-1" when the M command is not being executed.

FIG. 4 is a flow chart showing the output processing of the M command according to the embodiment of the present invention. When the M command is issued, the value of MD 151 shown in FIG.
1 "to determine whether the M command is being executed in the PC unit 2 (step 120).
1). If the M command is being executed in the PC section 2, the PC
Since it is not possible to execute the next M command to the part 2, the output of the M command is incomplete and the process ends (step 1).
209). In this case, since the M command has not been processed, the next command is not executed and the M command output process shown in FIG. 4 is performed again later.

If the M command is not being executed in the PC section 2, the M command value specified in the MD 151 is stored (step 1202). Next, the M command value is output to the PC unit 2 (step 1203), and the MF signal is turned on (step 1204). Subsequently, it is confirmed whether or not the waiting for completion of the M command is an unnecessary M command (step 1205). This is shown in Figure 2.
In the above, it is to determine whether or not it is an M command for which "*" is designated in the "no need for completion waiting" section 163.

If the M command requires waiting for completion of the M command,
Next command execution is not permitted (step 1206). If this "Next command execution is not permitted", the next command is executed by M
It shall be done after waiting for the completion of the order. If the M command does not need to wait for the completion of the M command, execution of the next command is permitted (step 1207). When the "execution of next command is permitted", the next command is executed without waiting for the completion of the M command. Since the output of the M command to the PC unit 2 is completed, the output of the M command is completed (step 120).
8).

The process of FIG. 4 is a part which is activated in the program executed at regular intervals when the process of the M command is required. In the figure, the output of the M command is incomplete (step 1209). 4) is performed again in the next cycle, the output of the M command is completed (step 1208).
It is repeatedly executed until.

FIG. 5 is a flow chart showing the completion processing of the M command. When the commanded M command is completed in the PC unit 2, a completion signal (FIN) is sent to the NC unit 1. In response to this, the NC unit 1 performs the following processing.
First, since there is no M command being executed in the PC unit 2, the value of MD 151 is set to "-1" (step 1301). Next, the MF signal is turned off (step 1302) and the FIN signal is turned off (step 1).
303), and finally, the M command BCD output is turned off (step 1304), and the process ends.

FIG. 7 is an explanatory diagram for explaining the processing of the NC unit 1 and the PC unit 2. 201 to 203 are PCs from the NC unit 1
M command value that is about to be output to the unit 2,
17 is a value of MD 151, and 221 to 226 are internal states of the PC unit 2. If Ma is instructed now (2
01), the value of MD 151 is “−1” (21
1) The data is directly output to the PC unit 2 and the value of MD 151 is changed to "a". Here, a is a command value of M.

In response to this, the PC section 2 executes Ma (221). When the execution of Ma ends (222), M
The value of D151 becomes "-1" (213). When the next M command Mb is commanded (202), since the value of MD 151 is "-1" (213), the data is directly output to the PC unit 2 and the value of MD 151 is changed to "b". Here, b is the command value of M.

In response to this, the PC unit 2 executes Mb (223). When the next M command Mc is commanded (20
3), the value of MD151 remains "b" because the PC unit 2 is still executing Mb, so the data output to the PC unit 2 is stopped and the value of MD151 becomes "-1". wait.

When the execution of Mb is completed, the PC unit 2 executes M
The value of D151 is set to "-1" (224). As a result, the NC unit 1 outputs the M command Mc to the PC unit 2 and the MD 151
Change the value of to "c". Here, c is the command value of M. In response to this, the PC unit 2 executes Mc (22).
5). At the time when the execution of Mc is completed (226), MD15
The value of 1 is set to "-1" (226). In the example of FIG. 7, it is assumed that Ma, Mb, and Mc are all M commands that do not have to wait for the completion of the M command.

In addition, the above-described embodiment is similar to the conventional NC unit 1 and P.
The case where the interface with the C unit 2 is left as is is shown, but in the case of the built-in PC which has been increasing in number in recent years, N
Since the C section 1 and the PC section 2 often have a common memory and are configured to exchange data with each other,
It is no longer necessary to interface with the conventional NC unit 1 and PC unit 2.

For example, signals such as MF and FIN are N
This is necessary when the C section 1 and the PC section 2 can only transmit and receive bit-unit data, and in a system having a built-in PC, the NC section 1 and the PC section 2 have a common memory, If you can exchange data freely with each other, MD151
It is possible to process the M command only by itself. That is, M command value is set to N
When sending from the C section 1 to the PC section 2, it is only necessary to set the M command value in the MD 151, and when notifying the completion from the PC section 2 to the NC section 1, simply setting MD 151 to "-1". Good.

The NC unit 1 can confirm the completion of the M command by the MD 151 becoming "-1", and the PC unit 2 can confirm the completion of the N command.
MD 151 indicates that the M command has been sent from C section 1.
It can be confirmed by setting a value other than 1 ”. In the case of a system having such a built-in PC, it is possible to omit the processing steps 1203 and 1204 of FIG. 4 as shown in FIG.

Example 2. A numerically controlled machine tool according to another embodiment of the first invention will be described. In the first embodiment, the M command that does not need to wait for the completion of the M command is set from the screen, whereas in this embodiment, the distinction of waiting / not waiting for the completion of the M command is specified in the machining program. It is a thing. For example, an M command that needs to wait for the completion of the M command defines the M command value with a capital "M", such as M123 ;, and an M command that does not need to wait for the completion of the M command has a lowercase character such as m123 ;. M command value is defined by "m" of the above, and the determination in step 1205 of FIGS. 4 and 6 is made to determine whether the specified M command is commanded by "M" or by "m". Good.

Further, the distinction of M is not limited to the above, and the M command which needs to wait for the completion of the M command is defined by the value of "+" as in the conventional M command value such as M123; For the M command that does not need to wait for the completion of, the M command value may be defined by a value of "-" like M-123 ;. In addition, as a method of distinguishing the two in the machining program, a lowercase letter is added to the M command that does not need to wait for the completion of the M command, such as "M123;" and "Mw123;", or "M123;" It is also possible to add a special character to an M command that does not need to wait for the completion of the M command, such as "M $ 123;". Instead of specifying the completion waiting unnecessary auxiliary command by the completion waiting unnecessary auxiliary command designating means in the first embodiment, in this embodiment, the completion waiting unnecessary auxiliary command is distinguished by upper / lower case or presence / absence of a sign in the machining program. It was possible to specify. Therefore, in the second embodiment, the next command block executability determining unit 55 determines the completion-necessary auxiliary command and the completion-waitless auxiliary command by distinguishing the auxiliary commands in the machining program.

Example 3. A numerically controlled machine tool according to an embodiment of the second invention will be described. In FIG. 1, 56
Is a test mode lock designating means for designating an auxiliary command which is not executed in the test mode, 57 is a test lock storing means for storing the auxiliary command designated by the test mode locking designating means, and 58 is a test mode during the test mode. It is a test lock determination means that confirms the test lock storage means and determines whether or not the auxiliary instruction designated by the machining program can be executed. Further, in FIG. 2, reference numeral 164 is a table for designating the M command that locks the output of the M command in the test mode (hereinafter referred to as “test lock” part), and “*” is indicated in the “test lock” part 164. Regarding the added M command, the M command is not output even if this M command is commanded in the test mode.

In FIG. 2, "*" is designated by the corresponding M.
The cursor is moved to the "test lock" portion 164 of the command, and if it is the M command that locks the output of the M command in the test mode, the numerical value "1" is keyed in. When "1" is keyed in, an "*" mark is displayed on the screen, indicating that the corresponding M command is designated as the M command that locks the output of the M command in the test mode. If it is a normal M command which does not lock the output of the M command in the test mode, "0" is keyed in. When "0" is keyed in, the corresponding part becomes blank on the screen.

FIG. 8 is a flow chart showing the output process of the M command. When the M command is issued, it is determined whether or not the test mode is set (step 1401). The designation of the test mode is performed by a selection switch (not shown) on the NC operation panel 11.

If not in the test mode, the output process of the M command is performed as usual (step 1403). In the test mode, it is confirmed whether the designated M command is the M command that locks the output of the M command in the test mode (step 1402). This is shown in FIG.
This is to determine whether or not it is an M command for which "*" is designated in the "test lock" section 164. If the M command locks the output of the M command in the test mode, the process ends without outputting the M command. This means that the specified M command was ignored.

Example 4. A numerically controlled machine tool according to an embodiment of the third invention will be described. In FIG. 1, 59
Is a forced output designating means in the test mode for designating an auxiliary instruction that enables execution even if the auxiliary instruction is locked by a locking means for locking the auxiliary instruction (not shown), and 60 is the test mode The forced output storage means for storing the auxiliary command designated by the forced output designation means, 61 confirms the forced output storage means even when the auxiliary command is locked by the lock means in the test mode. Then, the forced output determination means determines whether or not the auxiliary command designated by the machining program can be executed. Further, in FIG. 2, reference numeral 165 denotes a table for designating the M command that outputs the M command even when the auxiliary command is locked (hereinafter referred to as “forced output” section).
Regarding the M command to which “*” is added to the section 165, the M command is output even when the auxiliary command is locked.

In FIG. 2, "*" is designated by the corresponding M.
The cursor is moved to the "forced output" portion 165 of the command, and if the command is the M command that outputs the M command even when the auxiliary command is locked, the numerical value "1" is keyed in. When "1" is keyed in, a mark "*" is displayed on the screen, indicating that the corresponding M command is designated as the M command that outputs the M command even when the auxiliary command is locked. If it is a normal M command that does not output the M command when the auxiliary command is locked, "0" is keyed in. When "0" is keyed in, the corresponding part becomes blank on the screen.

FIG. 9 is a flowchart showing the output processing of the M command. When the M command is issued, it is determined whether or not the auxiliary command is locked (step 1501). The designation of the auxiliary command lock is performed by a selection switch (not shown) on the NC operation panel 11.

If the auxiliary command is not locked, the output process of the M command is performed as usual (step 1503). If the auxiliary command is locked, it is confirmed whether the specified M command is the M command that outputs the M command even when the auxiliary command is locked (step 1502). This is to determine whether or not it is an M command for which "*" is designated in the "forced output" section 165 in FIG.

M for outputting an M command when the auxiliary command is locked
If it is not a command, the process ends without outputting the M command. This means that the specified M command was ignored. If the M command outputs the M command when the auxiliary command is locked, the M command is output even when the auxiliary command is locked (step 1503).

Example 5. A numerically controlled machine tool according to an embodiment of the fourth invention will be described. FIG. 10 is a block diagram of an essential part for designating a moving distance. The processing of each of these blocks is executed by the software of the numerical controller. In the figure, the pre-processing operation unit 43 exists in the NC units 1 and 1A, reads the machining program 103,
The movement command is sent to the interpolation unit 45. Machining program 103
Can be either a normal EIA processing program or an automatic program which has been widely used in recent years. Reference numeral 40 is a test movement distance designating unit that designates a movement distance of the tool in the test mode, and 44 is data existing in the man-machine control unit 4 of the NC units 1 and 1A and input from the test movement distance designating unit 40. It is a designated movement distance extraction unit that calculates the designated movement distance of the tool based on.

The test mode is designated by the NC operation panel 11
It is assumed that the upper switch (not shown) is used, and the designated movement distance extraction unit 44 outputs an infinite movement distance to the interpolation unit 45 unless in the test mode. For example, numeric keypad 4
If it is input from 1, it is considered that the input numerical value specifies the movement distance specified in a predetermined unit,
This is the specified movement distance. Similarly, handle 4
If it is an input from 2, it is considered that the input pulse number specifies a moving distance specified in advance for each pulse, and this is set as the specified moving distance.

The interpolation unit 45 and the acceleration / deceleration control unit 46 are present in the axis movement control unit 6 of the NC units 1 and 1A, and the interpolation unit 45 uses the data transferred from the preprocessing operation unit 43 to move one block. L is obtained, and this is interpolated by the moving distance passed from the designated moving distance extracting unit 44.

The interpolated distribution pulse is applied to the acceleration / deceleration control unit 46.
Then, the acceleration / deceleration process is performed and the result is sent to the axis control circuit 47. The axis control circuit 47 converts the distributed pulse into a speed control signal,
It is sent to the servo amplifier 48. The servo amplifier 48 amplifies the speed control signal and drives the servo motor 18. The servo motor 18 has a pulse coder (not shown) for position detection.
Is incorporated, and the position feedback pulse is fed back to the axis control circuit 47. The axis control circuit 47 and the servo amplifier 48 are present in the speed control unit 17.

In FIG. 10, the axis control circuit 47, the servo amplifier 48, and the servo motor 18 show only one axis. Actually, a plurality of axes are required, but the elements of the other axes are the same, and are therefore omitted. FIG. 11 shows the interpolation unit 4
5 is a flowchart showing a process performed every time data is received from the designated movement distance extraction unit 44. FIG. 13 is an explanatory diagram of the processing performed by the interpolation 45, where L is the total movement distance of the block being executed, and if the block currently being executed is a block that moves linearly from point P1 to point P2, then P
The distance between the 1-P2 points is L. Point P3 is the end point of the next block, and the point currently being interpolated is the PN point.

The remaining distance of the block currently being processed is LA (step 1601), and the moving distance passed from the designated moving distance extracting unit 44 is LB (step 1602). In FIG. 13, the distance between PN-P2 is LA, and PN-PS
The distance between them is LB. The PS point is a point which moves by the moving distance LB passed from the designated moving distance extracting unit 44 and stops.

At this point, the total sum of the moving distances passed from the designated moving distance extracting unit 44 is set as LC, and LB is added to LC (step 1603). This is a process in the case where the movement command value is passed again from the movement distance extraction unit 44 before the movement distance LB passed from the designated movement distance extraction unit 44 is reached. Since the moving distance LB passed from the designated moving distance extracting unit 44 has been processed, the value of LB is cleared to 0 (step 1604).

The remaining distance LA of the currently executed block is compared with the total sum LC of the designated movement distances. If LA is larger, the processing is executed from step 1606, and if LA is smaller, the processing is executed from step 1608. (Step 160
5). LA is larger when LA has a smaller remaining distance even if it is moved by the designated movement distance LB as shown in FIG. 13, and LA is smaller than LA is smaller.
This is a case where, as shown in FIG. 14, when the movement is performed by the designated movement distance LB, the remaining distance of the currently executed block is exceeded.

When LA is larger, the remaining distance LL to be interpolated is set to LC (step 1606), and the value of LC is cleared to 0 because the processing for moving by LC is performed (step 1607). This is to set the distance LL until the block is stopped to the specified moving distance LC because it has to be moved by the specified total moving distance and stopped in the middle of the block currently being executed.

If LA is smaller than LA, the remaining distance LL to be interpolated is set to LA (step 1608), and since the processing for moving by LA has been performed, the value of LC is subtracted by LA (step 1609). This is because the block remaining distance currently being executed will be exceeded if moved by the specified total movement distance, so the distance LL is set as the remaining distance LA of the block currently being executed in order to move the remaining distance currently being executed. The value of the remaining designated movement amount is set in LC.

FIG. 12 is a flowchart relating to the interpolation processing performed by the interpolation unit 45. The moving distance LL is compared with the moving distance DF per unit time (step 1701).
The moving distance DF per unit time is a value converted into a moving amount per unit time that interpolates the feed speed of the designated tool. If LL is larger than DF, the movement amount DL to be interpolated is set to DF (step 1702). Normally LL is larger than DF, but when LL is smaller than DF, the movement amount DL to be interpolated is set to LL (step 170).
3). This is the last interpolation among the interpolations for moving the moving distance LL.

A movement component of each axis that moves the currently executed block by the movement distance DL is calculated (step 17).
04). This is similar to the conventional interpolation of CNC. Since it has been moved by DL, the moving distance LL is DL
Minute subtraction is performed (step 1705), and the remaining distance LA of the currently executed block is also subtracted by DL (step 1706).
It is determined whether or not the designated movement distance LL has become 0 (step 1707). This is to determine whether or not the movement of the designated movement distance has been completed. If it is 0, it is then determined whether LC has become 0 (step 1708). This is to determine whether or not the movement of the total sum of the movement distances passed from the designated movement distance extraction unit 44 has been completed. If it is 0, it is considered that the movement for the movement distance passed from the designated movement distance extraction unit 44 is completed, and the movement of the tool is stopped in the feed hold state (step 1709).

After that, every time a movement command is issued from the designated movement distance extraction unit 44, the movement is moved by that amount, and when the movement by the designated movement amount is completed, the cycle of stopping the movement of the tool in the feed hold state is being executed again. Repeat until the machining program of is completed.

Example 6. In the fourth invention, the test
The numeric keypad 41 on the NC operation panel 11 is used as the test movement distance designation unit 40 for designating the movement distance of the tool in the mode, and the designated movement distance extraction unit 44 also stores the numerical data input from the numeric keypad 41. Then, the designated movement distance of the tool is calculated. Designated moving distance extraction unit 44
The subsequent operation is similar to that of the fourth aspect of the invention, and the description thereof is omitted.

Example 7. In the fourth invention, the test
A handle 42 on the machine operation panel 12 is used as the test movement distance designating unit 40 for designating the movement distance of the tool in the mode, and the designated movement distance extracting unit 44 also stores the pulse data input from the handle 42. Then, the designated movement distance of the tool is calculated. Designated moving distance extraction unit 4
The operations after 4 are the same as in the fourth aspect of the invention, and the description thereof will be omitted.

[0072]

According to the numerically controlled machine tool of the first aspect of the present invention, with respect to the M command which does not need to wait for the completion of the M command, it is necessary to wait for the completion of the M command in order to immediately execute the next command. It is possible to perform M command processing without any error at high speed. When the next M command is designated, the M command is always output to the PC unit 2 after waiting for the completion of the previously commanded M command. It is possible to adapt without changing the interface.

With the numerically controlled machine tool according to the second aspect of the present invention, it is possible to prevent the M command, which is not desired to be executed in the test mode, from being executed without changing the machining program. Testing of real-world programs has become safe and easy.

With the numerically controlled machine tool according to the third aspect of the present invention, it becomes possible to execute the M command to be executed even when the auxiliary command is locked, without changing the machining program. You can now easily check the actual operation of the program.

According to the numerically controlled machine tool of the fourth aspect of the present invention, the tool can be moved by the designated movement distance and stopped, so that the check regarding the movement of the tool in the machining program can be easily performed. For example, if the tool is likely to interfere with the work or tailstock, move the tool little by little to test whether or not it interferes.In such a case, the operator can arbitrarily specify the amount of movement, so the operator can It is possible to test with confidence.

[Brief description of drawings]

FIG. 1 is a CN with a built-in PC showing an embodiment of the present invention.
It is a schematic block diagram of the CNC machine tool which used C.

FIG. 2 is a screen display example for designating an M command according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a table showing a state of an M command showing an embodiment of the present invention.

FIG. 4 is a flowchart showing an M command output process showing the first and second embodiments of the present invention.

FIG. 5 is a flowchart showing an M command completion process according to the first and second embodiments of the present invention.

FIG. 6 is a flowchart showing an M command output process showing the first and second embodiments of the present invention.

FIG. 7 is an explanatory diagram illustrating processing of the NC unit and the PC unit according to the first and second embodiments of the present invention.

FIG. 8 is a flowchart showing an M command output process according to the third embodiment of the present invention.

FIG. 9 is a flow chart showing an M command output process showing a fourth embodiment of the present invention.

FIG. 10 is a block diagram of essential parts for designating a moving distance, showing Embodiments 5 to 7 of the present invention.

FIG. 11 is a flowchart of pre-interpolation processing in the interpolating means showing the fifth to seventh embodiments of the present invention.

FIG. 12 is a flowchart of interpolation processing in the interpolation means showing the fifth to seventh embodiments of the present invention.

FIG. 13 is an explanatory diagram of processing performed by the interpolation means according to the fifth to seventh embodiments of the present invention.

FIG. 14 is an explanatory diagram of processing performed by the interpolation means according to the fifth to seventh embodiments of the present invention.

FIG. 15 is a schematic diagram of a CNC machine tool using a CNC with a built-in PC.

FIG. 16 is an explanatory diagram of an interface for an auxiliary function signal.

FIG. 17 is a time chart of an M command processing operation.

FIG. 18 is a diagram showing a flow from creation of a machining program to inspection of a workpiece.

[Explanation of symbols]

 1 NC part 1A NC part 2 PC part 3 Input / output circuit 4 Man-machine control part 5 Auxiliary command control part 6 Axis movement control part 10 CNC part 10A CNC part 11 NC operation panel 12 Machine operation panel 13 High-voltage circuit 14 Machine parts 15 Spindle Amplifier 16 Spindle motor 17 Speed control unit 18 Feed motor 20 Machine tool section 41 Numeric keypad 42 Handle 43 Pre-processing calculation section 44 Designated movement distance extraction section 45 Interpolation section 46 Acceleration / deceleration control section 47 Axis control circuit 48 Servo amplifier 51 No need to wait completion auxiliary Command designation unit 52 Execution auxiliary command registration unit 53 Execution auxiliary command storage unit 54 Auxiliary command execution availability determination unit 55 Next block execution availability determination unit 56 Test mode lock specification unit 57 Test lock storage unit 58 Test lock determination unit 59 Test mode Hour forced output specification section 60 forced output description Part 61 forced output determination unit 151 running the M command value 161 M command value 163 "Complete waiting unnecessary" 164 "Test Lock" section 165 "Force output" section

Claims (4)

[Claims] 1. A numerically controlled machine tool that performs an auxiliary work for machining via a programmable controller section based on a machining program composed of a plurality of command blocks, and commands the auxiliary work. There is no problem even if the next command block is executed without waiting for the completion of the auxiliary command by the auxiliary command. Completion waiting unnecessary auxiliary command designating means for separately designating the auxiliary command unnecessary for completion, and execution at the time of execution of the auxiliary command. Execution assistance command registration means for writing the assistance command and erasing the assistance command when the assistance command is completed; execution assistance command storage means for storing the result registered by the execution assistance command registration means; When the second command block contains an auxiliary command with respect to the command block of FIG. An auxiliary command executability determining means for determining whether or not the auxiliary command is being executed in the command block, and if the auxiliary command is being executed, waiting for execution of the auxiliary command of the second command block; When the auxiliary command of the second command block is executed and the auxiliary command is a completion waiting unnecessary auxiliary command, the third command block is executed without waiting for the completion of the auxiliary command, and the auxiliary command waits for completion. A numerically controlled machine tool comprising: a next command block executability judging means for executing a third command block after waiting for the completion of the auxiliary command in the case of a necessary auxiliary command. 2. In a numerically controlled machine tool having a test mode for testing a machining program, a test mode lock designating means for designating an auxiliary command which is not executed in the test mode, and a test mode lock designating means. A test lock storage means for storing the auxiliary instruction; and a test lock determination means for checking the test lock storage means in the test mode and determining whether or not the auxiliary instruction designated by the machining program can be executed. A numerically controlled machine tool featuring. 3. A numerically controlled machine tool having a machining program test mode and lock means for locking the auxiliary instruction so that it is not executed, even if the auxiliary instruction is locked by the lock means. By a test mode forced output designating means for designating an auxiliary instruction that enables the following: a forced output storage means for storing the auxiliary instruction designated by the test mode forced output designating means; Even when the auxiliary instruction is locked, the forced output storage means is included, and the forced output determination means is provided for determining whether or not the auxiliary instruction designated by the machining program can be executed. A numerically controlled machine tool. 4. A numerical control machine tool having a machining program test mode, and a test movement amount designating means for designating a travel amount of a tool in the test mode, and a tool locus designated by the machining program in the test mode. A numerically controlled machine tool comprising: a designated movement distance extracting unit that executes the tool by moving the tool by the movement amount designated by the movement amount designating unit during the test.